Improvement in electric fire and burglar-alarms



sheenksneet V E. 'PQNTAINEL I V 'E LEUTRIGAL FIRE AND BURGLAR ALARM. No., 93,816. 7 Patented Aug. 17, 1867.

' I ava/6%! Wit/caves.- I I 9 2 Sheets-Sheet 2. E. FONTAINE. V ELECTRICAL FIRE AND BURGLAR ALARM.

No. 93,816. Pa'tented'Aug. 17, 1867.

and ring the bell.

'lhe hammer H is so weighted, and the arm (1? is I ,so formed, that the hammer will drop away from the EUGEZNEI'FONTAINE, OF

FORT WAYNE, INDIANA.

i Letters Patent No. 93,816, dated August 17, 186i).

IMPROVEMENT m nnnc'rmc- FIRE AND BuReLaR-Amnwrs.

The Schedule referred to in these Letters Patent making of this came.

To all whom it may clmcem;

Be itknown that I, Encnnn FQNTAINE, ofFort, Wayne, in the county of Allen, and State of Indiana, have invented a new and useful Improvement in Electric Fire and Burglar-Alarms; and I do hereby dew clare that the following isa full, clear, and exact description thereof, which will enable others skilled'i'n' the art to make and use thesaine, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure 1, Sheet I, is a front view of my improved apparatus, as connected with a door.

Figure 2, Sheet-I, is a horizontal section of the same. a Y Figure 3, Sheet II, is a vertical section of the same, taken through-the line at :c, fig. 1.

Figure 4, Sheet II, is a detail view of my improved device forbreakingthe circuits.

Figure 5, Sheet IT, is a detail sectional view of my improved fire alarnn Figure 6, SheetdI, is a side view of the sanie. Similar letters of reference indicate corresponding, parts.

My invention has for-its object to improve the 0011- struction of electric fire and burglar-alarms, so as-to make them more convenient in use, and more reliable 7 and effective in. operation vand It, consists in the construction and combination of the various parts of the apparatus, as hereinafter more fully described.

A is a stand, designed to be secured in some suitable position in thebedroom, or some other place, whence the'alarm can be readily heard.

To the stand'A are attached ahelix, B, hellQ, posts and screws 1), to secure the-wires, and a switch-key,

E, about-the construction of which parts there. is nothing new. I F is the armature, which is pivoted to supports attached to" the stand A, and to which is attached the lower-end of the hammei arln G, to the uppei'end of" which is attached the hanunerH, in such a position that when; the armature 1*" is drawninto contact with the poles of the magnet, the hammer H will strike hell by its owh weight.

is anal-1n formed upon the hammer-arm G, which, when the hammer H drops away from the bell, comes in contact with the spring I, which restsagainst the screw J, passing through the post-K,

with which the wires that form the circuit are connected. y H

The circuit-wires pass to each door and,window, in the casing of which theyare connected with two circuit.

s'prings, L, to one of which is attached a catclglifg which projects through a hole in the case of the with dow or do0r,.so as to rest against said window or door in. such a way, that when the window or door is closed, it may press the catch M back, and break the But should the door or window he opened, the clasticity of the spring L, to which the catch M is attached, will force the said catch M outward, and bring it in contact with the other spring L, completingithe circuit, and sounding the alarm.

As the door or window is closed, it will push the catch M in, breaking the circuit.

N are keys, the stems of which pass through the stand A, and have cross-heads, a, formed upon their inner ends, which,'when the circuit is closed, rest. upon the metal bar 0; and npon'them rest the free ends of the springs P, with which the circuit-wires leading to the catches L M are, connected.

If, now, an alarm. is sounded, by pushing the keys N inward, and turning them one-quarter around, so 1 window or door that has been opened will be indi cated.

R is a thermometer-bulb, the stem, S, of which is divided off into a scale in the ordinary mannei. The bulb R is attached to a plate, T, which is designed tobe attached to the ceilingof a room.

U is a. platinum wire, one end of which is connected with the circuit-wire leading to the alarm, and

the other end of which passes in through the lower 'end of the bulb L, so'as to be in contact with the mercury within said bulb. i

V is a platinum wire, the upper end of which is connected with the circuit-wire, and the lower end of which passes in,'through the stemof the thermometer,.th1'0ugh-a rubber-block, or other air-tight stuff- .and with it the platinum wire 'V, maybe raised or lowered, so as to bring the lower end of said wire op posite anydesired division-mark of the stein S.

As the stem S is concealed fi'omwiew, a correspondingseale should be marked upon the lower partof the bar'X, so that the positionof the wire V'rnay be adjusted, by adjusting the relative positions of 'the bar X and nut Y.

It, now, the lower end of the wire V is adjusted to any-division-mark, as, for instance, the one indicating 100, as soon as an increase of temperature has expandedthe mercury to that point, the circuit will be completed, and the alarm sounded.

The circuitrwircs should be provided with keys N,

to enable theroom from which the alarm has been. sounded to be at once indicated.

' metal bar 0, non-condncting bar Q, and springs P, with the wires of the circuit, substantially as herein shown and described, and for the purpose set forth. 3. The combination of the thermometer-bulb and stem R S, platinum wires U and V, sliding-bar X, having a screw-thread and scale formed upon its lower end, and swivelled nut Y, with each other, and with the circuit of an electric alarm, substantially as herein shown and described, and for the purpose set forth. I

The above specification of my invention signed by me, this 22d day of May, 1869.

EUGENE FONTAINE.

witnessesz. I

FRANK Bnocn'pnr, JAMES T. GRAHAM. 

